Combined burglar or fire alarm.



C. T. MATTHEWS.

COMBINED BURGLAR. 0R FIRE ALARM APPLICATION FILED 1uLY14. 916.

Patented May 7,1918.

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APPLICATION FILED JULYH. 1916.

Patented May 7,1918;

Q. T. MATTHEWS. COMBINED BURGLAR 0R FIRE ALARM.

APPLICATION HLED JULYH, I916- L265A'72. Patented May 7,1918.

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comamun nunemn on. Fran an To all whom it may concern:

Be it known that I, CAREY Ma rrnnws, a citizen of the United States,residln at Kennebec, in the county'of Wake and tate of North Carolina,have invented new and I useful Improvements in Combined Burglar or FireAlarms, of which the following is a specification.-

This invention relates to a comblned burglar and fire alarm system whichhas for its primary object to s1gnal a remote person, such as atelephone operator at a central office, that danger threatens a certambuildin so that the proper authoritles can be noti ed.

An object of the invention is the use of a plurality of signal deviceshaving different signaling characteristics so as to distlnguish forexample between a fire alarm and a burglar alarm.

Another object of the inventlon is the use of a system so constructedthat the same may be connected to the usual telephone line.

Besides the above my invention is distinguished in the novel manner ofassociating an indicating apparatus with the signaling system so that anindication will be given if the signaling system is not properly set.

With these and other objects in view the invention will be betterunderstood from the following detailed description taken in connectionwith the accompanying drawings, wherein Figure 1 is a side elevation ofthe cabinet with the cover removed.

Fig. 2 isa top plan view thereof.

Fig. 3 is a plan view of the indicator.

Fig. 4 is a diagrammatic view of the entire system.

Fig. 5 is a diagrammatic view of the in dicator.

Referring more particularly to Fig. 4 of the drawings the letter Adesignates a well known form of telephone system including atransmitting circuit 1 and a receiver 2.

In this particular instance I have shown my alarm system as connected tothe line wires 3 of a telephone apparatus and using an auxiliarytransmitter circuit 4 instead of the transmitter 1, but I wish it to beunderstood that the transmitting circuit 4 may be dispensed with and thetransmitter 1 used dethe telephone apparatus is to be constructed as aunitary article or my apparatus used as Specification of Letters Patent.at t m 7, 91 Application filed July 1a, 1916. Serial no. 109,953.

an independent apparatus. In the particular showing I have shown theabove parts arranged in the cabinet 5 havin a door not w bell isarranged in a similar circuit 11 includin a source of current 12.Arranged to bri ge the circuit 9 is a contact strip 13, while a similarstrip 14 is arranged to close the circuit 11.

Arranged to bridge the distance between the conductors 15 and 16 of thesecondary circuit of the transmitter 7 are contact strips 17 and 18adapted to move into engagement with contacts 19 and 20 connecteddirectly to-the conductor 15. Also associated with the contact strip 13is 'a contact strip 21, while similarly associated with the contactstrip 14 is a contact strip 22 for the purpose hereinafter described.Arranged to give movement to the contact strips 13, 17 and 21 closedposition by the movement of the bolt of the look.

A circuit breaker 32 is arranged to break the circuit 27 and consists ofan electromagnet 33 acting upon an armature 34 which cooperates with apivoted arm 35 to form a portion of the circuit 27 with the result thatwhen the armature is attracted and the arm'35 free to rotate about itspivot, the circuit will be broken. To insure the opening of the circuitby the circuit breaker, I mount in the circuit 27 a switch 36 arrangedto be opened by the impact of the closer 39 normally assuming a positionto open the circuit 37. The heating element of the thermostat 39 is inthe form of a coil 40 arranged in series in the circuit 27.

From this latter arrangement it Wlll be seen that upon closing of thecircuit 27 and the passage of current therethrough, the coil 40 willheat the thermostat 39 with the result that the same will move to aposition to close the circuit 37.

Upon this action taking place the magnets are energized which in turnattracts the armature away from the arm and breaks the circuitat thispoint. Upon the arm reaching an inactive position the SWItCh 36 will beopened and thus the opening of the c11 cuit 27 is insured. Tapped on tothe circu t 27 is a conductor 41 having arranged therein the magnet 26and the heat actuated circuit closer 42 the circuit 41 being normallybroken at this point.

Bridged across the circuit 27 so as to short-circuit the circuit closer28 and switch 29 is a conductor 43 normally broken and this break isadapted to be bridged by the movement of contact strip 21. A conductor45 cotiperates with the contact strip 22 to accomplish the same purposewith the break 44 and heat actuated-circuit closer 42.

As far as I have proceeded it will be seen I that when a burglaroperated device is set into operation or the fire device set intooperation, a circuit will be closed for energizing either of the magnets24 or 26 and the continuity of this circuit is controlled by the circuitbreaker 32. Upon current flowing through either of the magnets 24 or 26a predetermined interval, enough heat Will be generated by the coil 40to actuate the thermostatic circuit closer 39. When this takes place thecircuit breaker 32 will operate and prevent further current consumption.

From this arrangement it will be seen that sound waves of differentcharacteristics .can be passed over the line wires 3 of the telephoneset for giving signals to the operator at central ofiice so that she maynotify the proper authorities.

I have shown illustrated with my alarm system an indicating system bymeans of which communication will begiven when the different circuitclosers in the alarm system are not properly set.

Referring to Fig. 4 ofthe drawings it will be seen that this systemconsists of an electric magnet 46 arranged in a normally open circuit 47having arranged therein a source of current 48. The terminals of thecircuit at the break therein are connected to spaced contacts 49arranged for instance in the key hole 50 of a look so that upon theinsertion of a key, the distance between the contacts 49 may be bridged.Associated with the magnet 46 are normally engaging contact strips 51and 52 adapted to be disengaged by energization of magnet 46 and closingthe break in the partial circuit 53 that connects the door operatedcircuit closer 54 and the ,key operated switch 55 with binding posts 56and 57 that, are in turn properly connected to the alarmsystem, partialcircuit 53 thus being bridged across the portion of circuit 27 includingthe circuit closer 28 and switch 29. It will be seen from the drawingthat circuit closer 54 and switch 55 are adapted to operate in a similarmanner to circuit closer 28 and switch 29.

Associated with the contact strip 51 and adapted to be brought intoengagement therewith by energization of magnet 46 is a third contactstrip 58 forming the terminal for a conductor 59 which is arranged tobridge across the conductors forming the partial circuit 53 to one sideof the circuit closer 54 so that if the circuit closer 54 is in closedposition, current will flow from the battery 60 through a bell 61arranged in the conductor 59. It will be observed that upon connectingcontacts 49 as for instance by the insertion of a key in locking up abuilding, magnet 46 will be energized, thereby interrupting the circuitincluding circuit closer 54, switch 55, and magnet 24. Circuit closer 54will be simultaneously connected to the circuit of the indicator or bell61, and if in operative positlon due to an open position of a window ordoor to which it may be attached, bell 61 will be sounded. By thislatter arrangement it will be seen that I am able to accurately indicateat any point if any of the windows ordoors of the building are in openposition, it being understood that a plurality of the circuit closers 54may be substituted for the single one illustrated in the drawings.

It is to be understood that while all the several features of myimproved system have special cooperation with one another and togetherconstitute a particularly effective system for the purpose in view,certain of these features may be applied in other relations, and Itherefore desire to cover the combination present in the several partsof my improved system whether employed in the general organization shownor else for closing said circuit of the signal, a normally open circuitfor said magnet, and a circuit closer adapted to close said circuit ofsaid magnet, a second magnet having a circuitadapted to be closed by amanually actuated switch, said second magnet adapted when energized todisconnect said circuit closer from the signal circuit magnet and toconnect said circuit closer to said indicator.

2. In combination, arnormally open circuit, heat actuated means forclosing said circuit, electromechanical means for prolonging suchclosure, electrothermal means for opening said circuit after an intervalof time, and electromechanical means for rendering such openingpermanent; a circuit adapted to be closed by current flow in the firstmentioned circuit and including a signal device; a second circuit.adapted to be closed by current flow in the first mentioned circuit andcontaining a sound transmitting device; and line wires connected to saidsound transmitting device.

3. In a building protective system, a circuit including a circuit closeradapted to be actuated by an intruder, distinctive signal means adaptedto be actuated by closure of said circuit; a circuit including a heatactuated circuit closer, distinctive signal means adapted to be actuatedby closure of the second mentioned circuit; electromechanical means forprolonging the closure of said circuits, automatic means for openingsaid circuits after a desired interval of time, and automatic means formaking such opening permanent; line wires, and a transmitter adapted tosend such distinctive signals over said line wires.

4. In a building protective system, a circuit including a circuit closeradapted to be actuated by an intruder, signal means adapted to beactuated by closure of said circuit, a circuit including a heat-actuatedcircuit closer, and signal means adapted to be actuated by closure ofthe second mentioned circuit; electro-mechanical means for prolonging aclosure of said circuits, automatic means for opening said circuitsafter a closure of a predetermined duration, and automatic means forrendering such opening permanent; a line circuit, transmitting means forsaid line circuit, and means in each signal circuit operable by closureof the particular circuit to enable the last-mentioned means to transmitthe signal corresponding to the particular circuit.

5. In combination, in a building protective system, a circuit, anormally open circuit closer therein, a magnet, a circuit for saidmagnet, a manually controlled switch in said circuit of said magnet, anindicator adapted to be connected to said circuitcloser by energizationof said magnet, a second magnet, said second magnet included in thefirst mentioned circuit, and a line circuit adapted to be closed by saidsecond magnet.

6. In combination, in a building protective system, a circuit closeradapted to be actuated by the opening of a door or window in series witha circuit closer adapted to be actuated by movement of a lock, a linecircuit, means for closing said line circuit, said means normallyconnected to said circuit closers; an indicator, and means fordisconnecting said line circuit closing means from the first mentionedcircuit closer and connecting said indicator to the first mentionedcircuit closer.

7. In combination, in a building protective system, a circuit closer,transmitting means &

normally adapted to transmit a signal upon actuation of said circuitcloser, an indicator normally inoperable by said circuit closer, andmeans for rendering sald transmltter inoperable by said circuit closerand rendermg said indicator operable by said circuit I closer.

8. In a building protective system, signal transmitting means, meansadapted to be actuated by abnormal conditions to render said signaltransmitting means operative, a device for indicating a proper conditionof the second-mentioned means, and means for rendering said signaltransmitting means in.- operable by the second mentioned means andrendering said indicating device operable by said second mentionedmeans.

In testimony whereof I afiix my signature.

CAREY T. TTHEWS.

